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# Transmission Line Theory

45 Threads found on edaboard.com: Transmission Line Theory

## Microstrip Transmission lines. Need some Clarifications

Microstrip lines are same as other transmission lines like waveguide and coaxial cables. So transmission line theory is the pre-request before starting design process. In Microstrip lines it is the length of line which defines your components like inductor (...)

## Even and Odd mode velocities in quasi-TEM

Hi How can I calculate even and odd mode velocities in quasi-TEM mode for transmission lines?

## Reflect array unit cell design help

Welcome wizard_wiz, The setup sounds like a good start. However, it sounds as if there is a lack of understanding - I would go back and review the fundamentals of microwave engineering (transmission-line theory, etc.) before proceeding. It should be fairly evident that the reflection phase is the phase of S11. Good Luck

## How the series feedback of DRO works?

There isn't any feedback in that circuit schematic.There should be a transmission line at the emitter.

## Demonstration of Ferranti Effect in transmission line

In electrical engineering, the Ferranti effect is an increase in voltage occurring at the receiving end of a long transmission line, above the voltage at the sending end. This occurs when the line is energized, but there is a very light load or the load is disconnected. As far as I know and found after study, this effect is only found in

## 50ohm microstripline on silicon

Hi ing_2012, transmission-line theory is the one of the core topics of microwave engineering. Knowledge of this theory will help you to answer this question, which no one else can answer given the information you specified. See for example this textbook. Firstly, I would ensure that the anten

## ANSYS Maxwell Impedance Matrix

Welcome jcesar203, I've been working a fair bit with MTL theory lately so this looks familiar. However, I'm not sure what you mean by "the total resistance and reactance or impedance of a single conductor". One conductor by itself does not mean anything in transmission line theory, are you looking to extract the input (...)

## quarter wavelength line

I think someone filled your head with bad information. Any circuit with a transmission line in it can be properly analyzed with transmission line theory. For example, if you had a transmission line that was 1/100th of a wavelength in physical length...you could still (...)

## Any theory for (off center fed microstrip antennas)?

The classical transmission line model helps. Accordingly it is straightforward to understand that the impedance keeps stable when the feed location varies along the patch width, whereas it becomes quite sensitive when the feed location moves along the patch length.

## Bandwidth improvement parameters for waveguide structures

waveguides come in various types. Some have inherently wider bandwidths than others. Single ridge or double ridge, finline, etc, are examples. To get super bandwidth in waveguide components, one wants to try to avoid transmission line matching structures, and try for lumped or quasi lumped elements. Also, with the theory (...)

I am now studying about resonance on transmission line. Is there any recommendation on good study materials (books or any online materials) about the mechanism of resonance and the relationship between reflection (standing wave) as well as lambda/2? Further topics about resonance such as radiation(antenna theory), wave (...)

## When is high frequency theory necessary

Is there a rule when high frequency theory must be used instead of the normal circuit theory? Eg. at what lengthes (in wavelengthes) of a line, the transmission line theory should be used.

## how co planar waveguide works ?

See transmission line theory, and Coplanar waveguide As for your second question, that's pretty vague. If you feed power into the matched input of an antenna, it'll generally radiate, regardless of

Voltage pulse comes up to a juncion. Voltage wave continues on past the junction, while another voltage wave travels up the stup. Some time later that voltage wave on stub hits a short circuit. transmission line theory says that for 0 V across the short circuit, to cancel the forward traveling voltage wave, a reverse wave of equal (...)

## theory result vs semulated for o.c microstrip line

and from transmission line theory whats effect of z0 i mean does its effect is like s11=(zIN-z0)/(zIN+z0) thank for you patient dear friends

## Interference power from 30MHz to 300MHz

Interference power from 30MHz to 300MHz on mains lead, measured by means of the absorbing clamp, is provided in CISPR 14-1: Requirements for household appliances, electric tools and similar apparatus. Is this related to measure of power in cable act as transmission line or measure of VSWR ? Can someone explain the theory that is involved in (...)

## Questions regarding distributed voltage controlled oscillator topology.

Hi again! There are some topics I'd like to discuss with you all, relating to the DVCO descibed in the paper I've attached. First i'll review some issues that might help achieving a better understanding 1 The "periodically loaded transmission line" is used as an analythical framework in distribuited amplifier theory. In fact, in its

## Coplanar Strip lines Z paramter graphs a spike using HFSS 12

Z21 is something different than the line impedance Z0 that you calculated in Matlab. The spike in Z21 is what you expect in theory for a transmission line with this length. If you want to check the line Z0, you are looking at the wrong parameter.

## About interconnects in 2.4GHz transceiver

Recenterly we worked on a 2.4G transceiver(IC). I wonder if the lines should be considered as transmission lines. According to transmission line theory, when the length of the line is comparable with the signal wave-length, it should be seen as transmission (...)

## What should be the dimensions for iris filter?

Hi All, I am required to design an iris filter. However, without going into deep calculation in transmission line theory, I need to learn basically the design criteria on how should be the length, width of irises or the length between irises, etc. Is there any document that you can recommend? Or someone give me information on this? (...)